童話, 由我們一起來畫

序數除了第1/2/3是不規則的變化, 其他都是規則的在數字後面加"th", 而字尾是Y的, 去Y加IETH, 就是英文的次數說法了.

下面是第1到第20的說法:
No..完整版         簡約版                     No..完整版                       簡約版
1.= first----------1st--------------- 11.= eleventh-----------11th
2.= second------2nd--------------  12.= twelfth-------------12th
3.= third---------3rd--------------- 13.= thirteenth----------13th
4.= fourth-------4th--------------- 14.= fourteenth---------14th
5.= fifth----------5th---------------15.= fifteenth------------15th
6.= sixth---------6th---------------16.= sixteenth-----------16th
7.= seventh------7th--------------  17.= seventeenth--------17th
8.= eighth--------8th--------------  18.= eighteenth----------18th
9.= ninth----------9th-------------  19.= nineteenth----------19th
10.=tenth--------10th-------------  20.= twentieth------------20th

至於第21/22/23/24........
21.= twenty first----------21st-------- 31.= thirty first-------------31st
22.= twenty second----- 22nd--------- 32.= thirty second--------32nd
23.= twenty third---------23rd-------- 33.= thirty third---------- 33rd
24.= twenty fourth-------24th-------- 34.= thirty forth----------34th

依此類推

參考資料
rubyhooray